Difference in the magnitude of muscle damage between elbow flexors and knee extensors eccentric exercises

The aim of this study was to investigate the difference in themagnitude of muscle damage between maximal eccentric exercisesof the elbow flexors (ef) and knee extensors (ke). twelvesedentary male volunteers participated in the study. range ofmotion (rom), isometric peak torque (ipt), delayed onset ofmuscle soreness (doms), creatine kinase activity (ck), andmyoglobin concentration (mb) were evaluated before, immediatelyafter, and on the 1st , 2nd, 3rd , and 7th days following exercise.total work (tw) during exercises was recorded and correctedby muscle volume (twc). twc was greater (p < 0.01) foref [24 (2) joule·cm-3] than for ke [7 (0.4) joule·cm-3]. increasesin ck on the 2nd , 3rd , and 7th days (p < 0.01) and increases inmb on the 1st , 2nd , 3rd , and 7th days were significantly(p<0.01) larger for ef than for ke. the decline in ipt wasgreater (p < 0.05- 0.01) for ef at all test occasions comparedwith ke. the results of this study demonstrate that the magnitudeof muscle damage is greater and the recovery is slowerfollowing maximal eccentric exercise of the ef than of the kefor sedentary males.